Don't run kill_python as part of the build process.  Change the buildbots so they have to call it explicitly instead.
diff --git a/Tools/buildbot/build.bat b/Tools/buildbot/build.bat
index 6bac3ed..ab3ea7d 100644
--- a/Tools/buildbot/build.bat
+++ b/Tools/buildbot/build.bat
@@ -2,5 +2,6 @@
 cmd /c Tools\buildbot\external.bat
 call "%VS90COMNTOOLS%vsvars32.bat"
 cmd /c Tools\buildbot\clean.bat
+vcbuild /useenv PCbuild\kill_python.vcproj "Debug|Win32" && PCbuild\kill_python_d.exe
 vcbuild /useenv PCbuild\pcbuild.sln "Debug|Win32"